Propozycja zmian:
<div class="slider-container">
<div class="slider-title">
<h2>ELOOOO</h2>
</div>
<div class="slider-wrap">
<div class="slider-kwa img-one">
<span class="text-slider">wasf</span>
</div>
<div class="slider-kwa img-two"></div>
<div class="slider-kwa"></div>
</div>
</div>
* {
box-sizing: border-box;
}
.slider-container {
width: 95vw;
margin: 0 auto;
}
.slider-container .slider-title {
font-family: 'Recursive', sans-serif;
font-size: 35px;
text-align: center;
}
.slider-wrap {
display: flex;
flex-direction: row;
}
.slider-wrap .slider-kwa {
width: 33%;
height: 400px;
margin: 50px 42px 0 42px;
border: 2px solid black;
text-align: center;
box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.75);
-webkit-box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.75);
-moz-box-shadow: 10px 10px 5px 0px rgba(0,0,0,0.75);
}
.slider-wrap .img-one {
background-image: url(http://websamuraj.pl/examples/yt/scrollHeader/bg.jpg);
background-repeat: no-repeat;
background-attachment: fixed;
background-position: -100px -205px;
}
.slider-wrap .img-two {
background-image: url(https://source.unsplash.com/400x401);
background-repeat: no-repeat;
}
.slider-wrap .slider-kwa:last-child {
background-image: url(https://source.unsplash.com/400x402);
background-repeat: no-repeat;
}
.slider-wrap .text-slider {
position: relative;
top: 360px;
width: 100%;
display: block;
margin: 0;
padding: 0;
border: 0;
font-family: 'Recursive', sans-serif;
font-size: 25px;
color: white;
background-color: rgba(10,60,10,0.5)
}